Let x0 of type ι be given.
Let x1 of type ι be given.
Let x2 of type ι be given.
Let x3 of type ι be given.
Apply unknownprop_c43d8335769836c36f9b797ba1eb1e4cdc54581b36d1df362a19e77c9778f7ce with
x0,
x1,
add_CSNo x2 x3 leaving 3 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying H1.
Apply CSNo_add_CSNo with
x2,
x3 leaving 2 subgoals.
The subproof is completed by applying H2.
The subproof is completed by applying H3.